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Add headers to Kafka MQT error topics (#1701)

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Co-authored-by: Vishal <vishal-biyani@users.noreply.github.com>
This commit is contained in:
ankitjain235
2020-09-07 19:13:36 +05:30
committed by GitHub
co-authored by Vishal
parent 70b01eb9c8
commit 975286c2ac
1 changed files with 27 additions and 5 deletions
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pkg/mqtrigger/messageQueue/kafka/kafka.go
+27 -5
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@@ -47,6 +47,9 @@ func init() {
var (
// Need to use raw string to support escape sequence for - & . chars
validKafkaTopicName = regexp.MustCompile(`^[a-zA-Z0-9][a-zA-Z0-9\-\._]*[a-zA-Z0-9]$`)
// Map for ErrorTopic messages to maintain recycle counter
errorMessageMap = make(map[string]int)
)
type (
@@ -293,14 +296,32 @@ func kafkaMsgHandler(kafka *Kafka, producer sarama.SyncProducer, trigger *fv1.Me
zap.String("trigger", trigger.ObjectMeta.Name),
zap.String("body", string(body)))
generateErrorHeaders := func(errString string) []sarama.RecordHeader {
var errorHeaders []sarama.RecordHeader
if kafka.version.IsAtLeast(sarama.V0_11_0_0) {
if count, ok := errorMessageMap[errString]; ok {
errorMessageMap[errString] = count + 1
} else {
errorMessageMap[errString] = 1
}
errorHeaders = append(errorHeaders, sarama.RecordHeader{Key: []byte("MessageSource"), Value: []byte(trigger.Spec.Topic)})
errorHeaders = append(errorHeaders, sarama.RecordHeader{Key: []byte("RecycleCounter"), Value: []byte(strconv.Itoa(errorMessageMap[errString]))})
}
return errorHeaders
}
if err != nil {
errorString := string("request body error: " + string(body))
errorHeaders := generateErrorHeaders(errorString)
errorHandler(kafka.logger, trigger, producer, url,
errors.Wrapf(err, "request body error: %v", string(body)))
errors.Wrapf(err, errorString), errorHeaders)
return
}
if resp.StatusCode != 200 {
errorString := string("request returned failure: " + string(resp.StatusCode))
errorHeaders := generateErrorHeaders(errorString)
errorHandler(kafka.logger, trigger, producer, url,
fmt.Errorf("request returned failure: %v", resp.StatusCode))
fmt.Errorf("request returned failure: %v", resp.StatusCode), errorHeaders)
return
}
if len(trigger.Spec.ResponseTopic) > 0 {
@@ -334,11 +355,12 @@ func kafkaMsgHandler(kafka *Kafka, producer sarama.SyncProducer, trigger *fv1.Me
consumer.MarkOffset(msg, "") // mark message as processed
}
func errorHandler(logger *zap.Logger, trigger *fv1.MessageQueueTrigger, producer sarama.SyncProducer, funcUrl string, err error) {
func errorHandler(logger *zap.Logger, trigger *fv1.MessageQueueTrigger, producer sarama.SyncProducer, funcUrl string, err error, errorTopicHeaders []sarama.RecordHeader) {
if len(trigger.Spec.ErrorTopic) > 0 {
_, _, e := producer.SendMessage(&sarama.ProducerMessage{
Topic: trigger.Spec.ErrorTopic,
Value: sarama.StringEncoder(err.Error()),
Topic: trigger.Spec.ErrorTopic,
Value: sarama.StringEncoder(err.Error()),
Headers: errorTopicHeaders,
})
if e != nil {
logger.Error("failed to publish message to error topic",